[amsat-bb] Re: Original email about "First(?) 144-MHz-QSO via Reflexion on ISS"
ka1rrw at yahoo.com
Wed Dec 12 06:39:20 PST 2007
That is great news. I knew that someone would be
successful again. In the 1994 a few dedicated Mir
Space Stations supporters would meet cosmonaut
Aleksandr Serebrov on a private channel in the 2-meter
band. Dave Larsen N6CO would start the QSO from the
CA area as Mir went east. Then WF1F (Boston) would
pick up Alexksander over the Mississippi and then
later pass the QSO over to Joe W2KQ in New Jersey.
>From Boston I can not hear Joe in New Jersey 250 miles
away. However to my surprise when I told Aleksandr to
Call Joe, I could hear both sides of the conversation.
I could Hear Joes strong NJ accent. I could not
make out very many words from Joe, but I could clearly
tell it was him.
At the time of the contact, my antenna was pointing
East over the Atlantic at a low elevation with the
computer tracking Mir. Joe was also pointing East
over the Atlantic at Mir. Our antennas were Not
pointing at each other, they were both pointing out to
The only possible path was a refection off of Space
Station Mir. Also a little bit of morning ducking may
have enhanced the effect. Ducting alone world not have
crated the path. At the time were we both running
similar stations, M2 CP22 beams, FM and aprox 2-3kerp.
Congratulations to all and lets keep trying for more
Ps Any colleges out there interested in building a
mode B/J analog-transponder for the Moon.
Need an experienced team to build a dozen Cube-Sat
size transponders so we can attach one to a Moon
Lander in a few years.
73 Miles WF1F at Marexmg.or
--- w8iss at wideopenwest.com wrote:
> Here's the original email I received off the
> Moon-net EME reflector Sunday for
> those of you who are not subscribed to it.
> James W8ISS
> ---------- Forwarded Message -----------
> From: "DF2ZC"
> To: "'Moon-Net'" <moon-net at list-serv.davidv.net>
> Sent: Sun, 9 Dec 2007 17:58:19 +0100
> Subject: [Moon-net] First(?) 144-MHz-QSO via
> Reflexion on ISS
> Hello All,
> Triggered by Peter SM2CEW's tries to complete a QSO
> by using the ISS as a
> reflector Frank DH7FB and I decided to try that as
> well. From Peter's
> experience (and also Frank's when SWLing Peter's
> tries) we believed it would
> be worthwile considering BPSK63 as this would enable
> us to exchange all
> information within few seconds only (using the EME
> report and QSO rules).
> However with the first tries on 8 December we
> quickly had to realise the
> amazingly quickly changing large doppler makes use
> of this mode impossible
> and we returned back to good old CW since this is
> also copyable at such a
> situation when you are not 100% tuned on the signal.
> The second try today
> Sunday 9 December at ISS orbit 51845 starting with a
> common window at 1626Z
> we copied signals at elevations of > 20 degrees and
> within a minute
> exchanged all data. Signal reports were about
> S3...S5 (DF2ZC running only
> 300 watts out). It was a tough task to follow the
> quick doppler changes and
> also adjust elevation and azimuth rotators. Two
> hands is at least one too
> That was a thrill! And now we are celebrating...
> And we will try more QSOs the coming days.
> btw http://www.n2yo.com/ gives a nice live google
> earth graphics display of
> ISS and other satellites.
> vy 73 Bernd DF2ZC (JO30RN)
> 144 MHz EME NewsLetter:
> 144 MHz DXCC #21
> 144 MHz WAC
> Kenwood TS 2000
> 2 x GU74b by LZ2US
> 4 x 2M18XXX 21 dBd full elevation
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> ------- End of Forwarded Message -------
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